User's Manual

7
DRAFT COPY
2. Initialization and Range
a) After the start-up sequence, the Portable Unit will send an Ini-
tialization signal to the Base Station to log in. The Base Station
will respond by showing “ACK” for the identity assigned to that
Portable Unit.
b) If the respirator user moves too far from the Base Station after
logging-in, the Portable Unit will begin to display “RNGE” indi-
cating out of range until the user moves back into the Base
Station field of operation (up to one-half mile line-of-sight).
c) If the Portable Unit is too far away from the Base Station at
start-up, or if the Base Station is not powered up, the Portable
Unit display will read “RNGE” right from start-up and not be
logged into the Base Station. The Portable Unit will continue
trying to log-in to a Base Station until one comes into range or
is powered up.
d) Except for those functions which involve communication with
the Base Station, all other functions of the Portable Unit and
PAK-ALERT EMS distress alarm are still operational when the
Portable Unit is either out of range or not logged into a Base
Station.
3. Air Supply Cylinder Pressure
a) To check the air supply cylinder pressure, the user must press
and hold the RESET button on the Portable Unit. The approxi-
mate pressure remaining in the cylinder will be shown in the
display as PSIG.
b) When the cylinder reaches one-half of full pressure, the alert
sound will occur and the Portable Unit will display “1/2 AIR” for
ten seconds.
c) When the cylinder reaches one-quarter of full pressure, the
alert sound will occur and the Portable Unit will display “LOW
AIR”. A low air signal will be sent to the Base Station within ten
seconds. This end of service time indicator (EOSTI) alarm can-
not be silenced by the user until the user leaves the hazardous
area and shuts down the respirator. The Base Station operator
must press “ACK” on the Base Station to acknowledge the
user’s low air signal.
4. Distress Alarm
a) If the user is in distress or becomes immobile, the PAK-ALERT
EMS distress alarm will operate in conjunction with the Por-
table Unit. If the distress alarm is activated, either by the user
pressing and holding the MANUAL ALARM for at least two
seconds, or from the user being immobile for the required time
duration, the Portable Unit will send a distress signal to the
Base Station. The distress alarm will override all other mes-
sages and actions of the Portable Unit.
b) When the Base Station acknowledges the user’s distress sig-
nal by pressing the “ACK” button on the Base Station, the
Portable Unit will respond by displaying “PASS” and continu-
ing to sound the distress alarm on the respirator. The distress
alarm will continue until the user shuts down the respirator.
WARNING
THE RESPIRATOR USER MUST IMMEDI-
ATELY LEAVE THE AREA REQUIRING
RESPIRATORY PROTECTION WHEN AN
END OF SERVICE INDICATOR ALARM
ACTUATES. ACTUATION OF AN END OF
SERVICE INDICATOR ALARM WARNS
THAT APPROXIMATELY 25% OF FULL
PRESSURE REMAINS IN THE AIR SUPPLY
CYLINDER (THAT IS, APPROXIMATELY
3/4 OF THE TOTAL AIR SUPPLY HAS
BEEN USED). A DELAY IN LEAVING THE
AREA AFTER ALARM ACTUATION MAY
RESULT IN SERIOUS INJURY OR
DEATH.